Who was the President of Indian National Congress when India became free?

Mahatma Gandhi

Jawahar Lal Nehru

J. B. Kripalani

Sardar Vallabhbhai Patel

having septic tanks for each house

checking mixing of industrial waste with water bodies

use of degradable pesticides

all of the above

the upper flange

the web

the lower flange

Any of these

25 Hz

50 Hz

100 Hz

0.02 Hz

modulating voltage

any voltage

both (A) and (B)

none of the above