Question

please help me to answer 7th and 9th​

Answer 1

$\huge \text{Hey mate !!}$

Answer of 7th is option B that is (i) (iii)  (ii)  (v)  (iv)

And the answer of 9th is cylindrical lens.

Sorry I don't know which one is a correct diagram of cylindrical lens in Ques. no. 9

Hope it will help you ^_^