State the exact location of the following:

(i) Chloroplast

(ii) Incus

(iii) Corpus callosum

(iv) Guard cells

(v) Pulmonary semilunar valve

Given below are six sets with four terms each. In each set a term is an odd one and cannot be grouped in the same category to which the other three belong. Identify the odd one in each set and name the category to which the remaining three belong. The first one has been done as an example :

Example : Fructose, Sucrose, Glucose, Calcium.
Odd term: Calcium
Category: Carbohydrates

(i) Carbonic acid, Acetic acid, benzoic acid, boric acid.

(ii) Saliva, bile, sweat, tears.

(iii) Cretinism, Myxedema, Simple goitre, Acromegaly.

(iv) Sneezing, coughing, blinking, typing.

(v) Semicircular canals, Cochlea, tympanum, utriculus.

Choose the correct answer from the four options given below:

The cell component visible only during cell division:

1. Mitochondria
2. Chloroplast
3. Chromosome
4. Chromatin

Choose the correct answer from the four options given below:

Pulse wave is mainly caused by the:

1. Systole of atria
2. Diastole of atria
3. Systole of the left ventricle
4. Systole of the right ventricle