Question

The mental exercises develop the student’s
(a) Vigil
(b) Nervous system
(c) Understanding
(d) Stamina

Answer 1

The answer is stamina. Please mark me as brainliest

Answer 2

The mental exercises develop the student’s nervous system.  

Option (b)

Explanation:  

• Mental exercises are of different types but they have immense advantages. They help in 'improving' the awareness, consciousness, spontaneity, alertness, and concentration of a student.
• Therefore, in other words, the 'nervous system' of the student gets improved in this process.
• Mental exercises make a student active and agile and help him or her to solve difficult situations and problems in life as well as in academia.