Answer: D) All the above Explanation: Nitrogenous base: A molecule that contains nitrogen and has the chemical properties of a base.   DNA and RNA ::   The nitrogenous bases in DNA are Adenine (A), Guanine (G), Thymine (T), and Cytosine (C).   Whereas the nitrogenous bases in RNA are the same, with one exception: Adenine (A), Guanine (G), Uracil (U), and Cytosine (C).

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Answer: A) 175 Explanation: Let the number of males be 'M'Let the number of females be 'F'From the given conditions,(F-15)=2M.....(i)F=5(M-45).....(ii)By solving the equations (1) & (2) we get M = 80 Then substitute M = 80 in (1)F = 2M + 15F = 2 x 80 + 15=> F = 175Therefore, number of males = 80 and females = 175 in the party.

1. In Rajasthan, men have been wearing a turban on their heads. Safa is not just a dress. In Rajasthan, there is heat for almost nine months and severe heat for three months. In such a situation, several layers of turban protect the head from heat waves and strong sunlight. Rajasthan has also been the land of heroes. Sometimes one had to go through a war of land and pride here. In such a situation, Safa also served as a protection against emergency attacks.

2. The one who tied the turban of Mewar Maharana was called Chhabdar.

Answer: C) 12 Explanation: Let the number of buffaloes be x  and number of ducks be y. Now, number of heads = x+y Number of legs = 4x+2y  .......(1)  But given that legs = 2(x+y)+24 ......(2)   solving (1) & (2),we get   4x+2y=2x+2y+24    --> x=12.   Therefore number of buffaloes =12