An online platform developed by lIT Madras to tackle e-waste is known as:

e-Source
e-Bin
e-Storage
e-Recycle

The correct answer is (a) e-Source.

e-Source is an online platform developed by IIT Madras to tackle e-waste. It is a one-stop solution for all your e-waste disposal needs. You can register on the platform and schedule a pickup of your e-waste. The e-waste will then be recycled or disposed of in an environmentally friendly manner.

e-Source is a great way to reduce your environmental impact and help protect the planet. It is also a convenient and easy way to dispose of your e-waste.

Here is a brief description of each option:

(b) e-Bin: e-Bin is a physical bin where you can dispose of your e-waste. However, it is not as convenient as e-Source, as you have to physically take your e-waste to the bin.

(c) e-Storage: e-Storage is a service that allows you to store your e-waste in a safe and secure location. However, it is not as environmentally friendly as e-Source, as the e-waste will still be stored in a landfill.

(d) e-Recycle: e-Recycle is a service that recycles your e-waste. However, it is not as convenient as e-Source, as you have to physically take your e-waste to a recycling center.