সাধারণ বিজ্ঞান

1. Main cause of night blindness is deficiency of Vitamin _

a. E

b. A

c. B

d. C

2. Main cause of night blindness is deficiency of Vitamin ---

a. E

b. A

c. B

d. C

e. D

3. 'Philology' is the ----

a. study of languages

b. study of birds

c. None of thesestudy of religions

d. study of birds

e. None of these