Unscramble the following words and match the following-

i	AERHMNEC	a	Voice box
ii	XALNYR	b	Condition of very big and bulging throat
iii	ETGIRO	c	Secretes insulin
iv	ARNPCESA	d	First menstrual flow

The correct option is (B):

i. MENARCHE d. First menstrual flow

1. Menarche is the term used for the first menstrual flow that marks puberty in girls.
   
2. It is the start of reproductive phase in women.
   

ii. LARYNX a. Voice box

1. Voice box is also known as the larynx.
   
2. The movement of the vocal cords inside the voice box helps with the generation of speech which is present inside the larynx.
   

iii. GOITRE b. Condition of very big and bulging throat

1. Goitre is a swelling in the neck resulting from an enlarged thyroid gland.
   
2. This occurs due to a deficiency of iodine.
   

iv. PANCREAS c. Secretes insulin

1. Pancreas secretes insulin which regulates blood sugar level.
2. The insulin is secreted directly into the blood so that blood sugar moves into the cells.
   

Final Answer: Hence, the correct option is B. i-d , ii-a , iii-b , iv-c.