Match List I with List II

List I (Sub Phases of Prophase I)		List II (Specific characters)
A	Diakinesis	I	Synaptonemal complex formation
B	Pachytene	II	Completion of terminalisation of chiasmata
C	Zygotene	III	Chromosomes look like thin threads
D	Leptotene	IV	Appearance of recombination nodules

Choose the correct answer from the options given below:

To find the correct match between the sub-phases of Prophase I (List I) and their specific characters (List II), let us analyze each phase step-by-step:

1. Leptotene (D): During this initial stage of Prophase I, the chromosomes become gradually visible under the light microscope. The compaction of chromosomes continues throughout leptotene, and they look like thin threads. Therefore, D matches with III.
2. Zygotene (C): During this stage, chromosomes start pairing together, a process called synapsis. This pairing is accompanied by the formation of a complex structure called the synaptonemal complex. Therefore, C matches with I.
3. Pachytene (B): During this stage, bivalent chromosomes clearly appear as tetrads. This stage is characterized by the appearance of recombination nodules, which are the sites where crossing over occurs between non-sister chromatids of homologous chromosomes. Therefore, B matches with IV.
4. Diakinesis (A): This is the final stage of meiotic prophase I. It is marked by the terminalisation of chiasmata. By the end of diakinesis, the nucleolus disappears and the nuclear envelope breaks down. Therefore, A matches with II.

Matching these pairs, we get:
A - II
B - IV
C - I
D - III

Hence, the correct option is A-II, B-IV, C-I, D-III.