The frequencies of `X`-rays, `gamma`-rays and ultraviolet rays are respectively `a, b and c` .Then

Options

A. `p gt q, gt r`
B. `p lt q, q gt r`
C. `p lt q, q lt r`
D. `p gt q, g lt r`

Answer

B

Explanation

Increasing order of wavelength as given below
`gamma`-rays `lt "X-rays" lt "ultraviolet rays"`
Frequency order,
`gamma-"ray" gt "X-rays" gt "ultravilot rays"`
`rArr q gt p gt r`
Thus, `q gt p`
`q gt r`
` p gt r`