$A$ distinctive and characteristic functional group in fats is

If the length of a stretched string is shortened by $40 \%$ and the tension is increased by $44 \%$,then the ratio of the final and initial fundamental frequencies is :

Which algae is rich in protein?

Which of the following is the characteristic outer electronic configuration of alkaline earth metals?

In the circuit shown in the figure,the potential difference between points $A$ and $B$ is $16 \, V$. The current passing through the $2 \, \Omega$ resistance will be ................. $A$.

What is the probability of a couple having four sons?