Which of the following statements is correct?

Match the following columns correctly:

Column-$I$	Column-$II$
$(a)$ $1 : 2 : 1$	$(i)$ Test cross
$(b)$ $3 : 1$	$(ii)$ Law of Dominance
$(c)$ $9 : 3 : 3 : 1$	$(iii)$ Incomplete Dominance
$(d)$ $1 : 1 : 1 : 1$	$(iv)$ Law of Independent Assortment
	$(v)$ Law of Segregation

Match List-$I$ with List-$II$:

List-$I$	List-$II$
$(A)$ Two or more alternative forms of a gene	$(I)$ Back cross
$(B)$ Cross of $F_1$ progeny with homozygous recessive parent	$(II)$ Ploidy
$(C)$ Cross of $F_1$ progeny with any of the parents	$(III)$ Allele
$(D)$ Number of chromosome sets in plant	$(IV)$ Test cross

Choose the correct answer from the options given below:

Pick out the correct statements.
$I.$ Haemophilia is a sex-linked recessive disease
$II.$ Down's syndrome is due to aneuploidy
$III.$ Phenylketonuria is an autosomal dominant gene disorder
$IV.$ Phenylketonuria is an autosomal recessive gene disorder
$V.$ Sickle cell anaemia is an $X$-linked recessive gene disorder

Which of the following organisms has the highest number of chromosomes?

Match the following:

Column-$I$	Column-$II$
$(1)$ Inheritance of two genes	$(a)$ $ABO$ blood group
$(2)$ Incomplete dominance	$(b)$ $1:2:1$
$(3)$ Codominance	$(c)$ $9:3:3:1$
$(4)$ Inheritance of one gene	$(d)$ $3:1$