Choose the correct answer from the four options given below:

A single highly coiled tube where sperms are stored, gets concentrated and mature is known as:

1. Epididymis
2. Vas efferentia
3. Vas deferens
4. Seminiferous tubule.

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Chromosomes get aligned at the center of the cell during:

1. Metaphase
2. Anaphase
3. Prophase
4. Telophase

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Which one of the following is mainly associated with the maintenance of the posture?

1. Cerebrum
2. Cerebellum
3. Thalamus
4. Pons

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An example of non-biodegradable waste is:

1. Vegetable peels
2. Sewage
3. Livestock waste
4. DDT.