Which of the following is the correct match for the hormone and its associated organ?

Statement-$I$: Melatonin helps in maintaining the normal rhythms of sleep-wake cycle and body temperature.
Statement-$II$: Thymosin plays a major role in the differentiation of $T$-lymphocytes.
Choose the correct answer from the options given below.

Match the following columns:

Column-$I$	Column-$II$
$P$. Anterior Pituitary	$I$. $MSH$
$Q$. Intermediate Pituitary	$II$. $ADH$
$R$. Posterior Pituitary	$III$. $LH$
	$IV$. $FSH$
	$V$. $GH$
	$VI$. Oxytocin
	$VII$. $PRL$
	$VIII$. $TSH$
	$IX$. $ACTH$

Intercellular communication in multicellular organisms occurs through

Which of the following statements is incorrect?

Choose the incorrect sentence.