Step 1: Understanding biodegradable polymers.
Biodegradable polymers are polymers that can be broken down by microorganisms into natural substances like water, carbon dioxide, and biomass.
Step 2: Analyzing the options.
- (A) Polyethylene: This is a non-biodegradable polymer commonly used in plastic bags and packaging.
- (B) Polyamide 6,6: This is a synthetic polymer that is not biodegradable.
- (C) Polypropylene: Like polyethylene, polypropylene is a non-biodegradable polymer.
- (D) Polylactic acid: This is a biodegradable polymer derived from renewable resources such as corn starch or sugarcane. It is commonly used in biodegradable plastics.
Step 3: Conclusion.
The correct answer is (D) Polylactic acid, as it is a biodegradable polymer.
Final Answer: Polylactic acid
In a polymer recycling plant, polymer “X” was depolymerized by glycolysis in the presence of ethylene glycol and a suitable catalyst. The glycolysis reaction yielded the following compound: 
Identify the polymer “X” from the following options.
An electricity utility company charges ₹7 per kWh. If a 40-watt desk light is left on for 10 hours each night for 180 days, what would be the cost of energy consumption? If the desk light is on for 2 more hours each night for the 180 days, what would be the percentage-increase in the cost of energy consumption?
In the context of the given figure, which one of the following options correctly represents the entries in the blocks labelled (i), (ii), (iii), and (iv), respectively?

A bag contains Violet (V), Yellow (Y), Red (R), and Green (G) balls. On counting them, the following results are obtained:
(i) The sum of Yellow balls and twice the number of Violet balls is 50.
(ii) The sum of Violet and Green balls is 50.
(iii) The sum of Yellow and Red balls is 50.
(iv) The sum of Violet and twice the number of Red balls is 50.
Which one of the following Pie charts correctly represents the balls in the bag?