Select the option that indicates the correct arrangement of the given words in the order in which they appear in an English dictionary.

1- Incest

2- Inception

3- Incense

4- Incapacity

5- Incentive

The correct answer is 4, 3, 5, 2, 1.

To arrange the given words in alphabetical order (as they appear in an English dictionary), we compare them letter by letter from left to right:

1. Incest
2. Inception
3. Incense
4. Incapacity
5. Incentive

All five words start with the letters "Inc". Therefore, we compare the fourth letter of each word:
- Word 1 (Ince...): Fourth letter is e
- Word 2 (Ince...): Fourth letter is e
- Word 3 (Ince...): Fourth letter is e
- Word 4 (Inca...): Fourth letter is a
- Word 5 (Ince...): Fourth letter is e

Since a comes before e in the alphabetical order, Incapacity (4) is the first word in the arrangement.

Now, we compare the remaining words (1, 2, 3, and 5) which all have e as their fourth letter. We compare their fifth letters:
- Word 1 (Inces...): Fifth letter is s
- Word 2 (Incep...): Fifth letter is p
- Word 3 (Incen...): Fifth letter is n
- Word 5 (Incen...): Fifth letter is n

Comparing the letters s, p, and n:
- n comes first, followed by p, and then s.
So, words starting with Incen... (3 and 5) will come next, followed by Inception (2), and finally Incest (1).

Next, we resolve the order between Word 3 (Incense) and Word 5 (Incentive) by comparing their sixth letters:
- Word 3 (Incens...): Sixth letter is s
- Word 5 (Incent...): Sixth letter is t
Since s comes before t, Incense (3) comes before Incentive (5).

Putting it all together, the final dictionary order is:
- 1st: Incapacity (4)
- 2nd: Incense (3)
- 3rd: Incentive (5)
- 4th: Inception (2)
- 5th: Incest (1)

Thus, the correct sequence is 4, 3, 5, 2, 1.