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In which of the following are hydrogels used

In which of the following are hydrogels used?
1. Controlled drug delivery in patients
2. Mobile air-conditioning systems
3. Preparation of industrial lubricants
Select the correct answer using the code given below:

(a)

1 only

(b)

1 and 2 only

(c)

2 and 3 only

(d)

1, 2 and 3*

Answer:

(a)

Non-traditional

Explanation

Hydrogels are used in controlled drug delivery systems due to their ability to absorb and release drugs in a controlled manner. Hydrogels can be used in mobile air-conditioning systems as desiccants to control humidity. Hydrogels are also used in the preparation of industrial lubricants due to their water retention properties and ability to reduce friction. Possible Sources: Material science and biomedical engineering references.