Excretion are the removal of waste products of metabolism from body. The excretory organs in cockroach and other insects are Malpighian tubules. Likwise in man, kidney is a part of excretory system. Excretory system consists of a pair of kidney, a pair of ureter, a urinary bladder and a urethra.

Correct Option: B

Excretion are the removal of waste products of metabolism from body. The excretory organs in cockroach and other insects are Malpighian tubules. Likwise in man, kidney is a part of excretory system. Excretory system consists of a pair of kidney, a pair of ureter, a urinary bladder and a urethra.

Lobsters belong to class Crustacea of phylum Arthropoda. Phylum Arthropoda is the largest phylum.

Correct Option: B

Lobsters belong to class Crustacea of phylum Arthropoda. Phylum Arthropoda is the largest phylum.

Measles is caused by virus

Correct Option: C

Measles is caused by virus

Typhoid

Correct Option: B

Typhoid

Xerophthalmia is not a genetic disorder. Xerophthalmia is a severe drying of the eye surface caused by a malfunction of the tear glands. Also found in people with immune disorders, it occurs most commonly because of decreased intake or absorption of vitamin A. symptoms include night blindness and eye irritation. In addition to the eyes being very dry, there is a loss of lustre on their surface. At later stages, the corneas become soft , with increased opacity.

Correct Option: D

Xerophthalmia is not a genetic disorder. Xerophthalmia is a severe drying of the eye surface caused by a malfunction of the tear glands. Also found in people with immune disorders, it occurs most commonly because of decreased intake or absorption of vitamin A. symptoms include night blindness and eye irritation. In addition to the eyes being very dry, there is a loss of lustre on their surface. At later stages, the corneas become soft , with increased opacity.