Helium was discovered by

(A) : Helium was discovered in chromosphere of the sum ( R ) : D_3 line is observed along with D_1 and D_2 1 in the solar spectrum The correct answer is

Nucleic acids were discovered by Or ltBrgt DNA was first discovered by

Who discovered ABO blood group. When was it discovered?

Helium is stabilised by the law of .........

(A) Helium is used in modem diving apparatus (R) Helium is chemically inert