1. A-2, B-4, C-1, D-3
2. A-2, B-3, C-4, D-1
3. A-3, B-4, C-1, D-2
4. A-3, B-1, C-4, D-2
1. C Benda in 1897
2. Kolliker in 1850
3. Claude in 1880
4. Kingsburg in 1882
1. Mangolian idiocy - 21st chromosome
2. Patau syndrome-13th chromosome
3. Cri-Du-Chat- 11th chromosome
4. Edward syndrome -18th chromosome
1. Single-stranded DNA
2. Single stranded RNA
3. double-stranded DNA
4. None of the above