Various accounting aspects involved on death of a partner are as follows:

(A) Adjustment in respect of unrecorded assets and liabilities

(B) Treatment of goodwill

(C) Preparation of Realization A/C

(D) Preparation of Executor's loan A/c

Choose the correct answer from the options given below:

The correct option is A), (B) and (D) only.

Detailed Explanation:
When a partner dies, the partnership firm undergoes reconstitution (unless there is an agreement to dissolve the firm). The accounting aspects involved focus on determining the final amount due to the deceased partner's legal representative (executor). Let us evaluate each of the given aspects:

(A) Adjustment in respect of unrecorded assets and liabilities:
Upon the death of a partner, it is necessary to revalue the firm's assets and liabilities to find the current true worth of the business. This ensures that any gain or loss from revaluation (including the estimation of unrecorded assets and liabilities) is shared among all partners, including the deceased partner, in their profit-sharing ratio. This is done using a Revaluation Account (not a Realization Account). Therefore, this aspect is involved.

(B) Treatment of goodwill:
The deceased partner contributed to earning the reputation and goodwill of the firm during their lifetime. On their death, the remaining partners compensate the deceased partner's estate for their share of goodwill. The deceased partner's capital account is credited with their share of goodwill, which is debited from the remaining (gaining) partners' capital accounts in their gaining ratio. Therefore, this aspect is involved.

(C) Preparation of Realization A/C:
A Realization Account is prepared only when a partnership firm is dissolved (i.e., the business is completely closed down, assets are sold, and liabilities are discharged). The death of a partner leads to the reconstitution of the firm, and the surviving partners typically continue the business. Hence, a Realization Account is not prepared on the death of a partner. Therefore, this aspect is not involved.

(D) Preparation of Executor's loan A/c:
The total accumulated dues (capital, share of goodwill, revaluation profit, etc.) of the deceased partner are transferred to their Executor's Account. If the firm is not in a position to pay the entire amount immediately, the outstanding balance is transferred to the Executor's Loan Account, which accumulates interest as per the partnership deed or Section 37 of the Indian Partnership Act, 1932. Therefore, this aspect is involved.

Conclusion:
Since aspects (A), (B), and (D) are part of the accounting treatment on the death of a partner, while (C) is a part of dissolution, the correct choice is A), (B) and (D) only.