CGPET 2018 Solved Paper

According to the relation,
λ=

h

mv

where, λ= wavelength,
h= Planck's constant,
m= mass of the moving particle and
v= velocity of the moving particle.
Given, mass of the particle (m)= mass of proton mp ) and velocity of particle (v)= velocity of light (c).
Thus, according to the relation
λ=

h

mv

=

h

mp.c

Hence, wavelength (λ) is inversely proportional to the velocity.
∴ Hence, (a) is the correct answer.