...... is known as the anti-sterility vitamin.

Assertion $A$: Living organisms obtain various molecules and elements from their environment.
Reason $R$: Living organisms synthesize components essential for their body.
Which option is correct for Assertion $A$ and Reason $R$?

Water is important for an animal's body in .........

The significance of the pentose phosphate pathway $(PPP)$ is:

Given below are two statements:
Statement $I$: $A$ protein is imagined as a line, the left end represented by the first amino acid ($N$-terminal) and the right end represented by the last amino acid ($C$-terminal).
Statement $II$: Adult human haemoglobin consists of $4$ subunits (two subunits of $\alpha$ type and two subunits of $\beta$ type).
In the light of the above statements, choose the correct answer from the options given below:

Of the following choices,the $pH$ of the least acidic solution is