Nitrogen fixing bacteria make combination with cell of the root of:

Detailed Solution:

The correct answer is “Pulses”.

Nitrogen-fixing bacteria, such as those in the genus Rhizobium, form symbiotic relationships with the roots of legumes (pulses). These bacteria help in fixing atmospheric nitrogen into a form that the plants can use for growth. Pulses include crops like peas, beans, lentils, and chickpeas.