Who among the following was appointed the first Director General of the CISF ?

The Central Industrial Security Force (CISF) was established on March 10, 1969, under the CISF Act, 1968. While Shri V.V. Nayar was the absolute first Director General (1969–1970), the question asks who among the following was appointed first. Comparing the provided options:

• Shri Surendranath served as the Director General from 1983 to 1985. His tenure is historically significant because the CISF Act was amended in 1983 to officially designate the force as an "Armed Force of the Union."
• Shri P.S. Bhinder served as DG from 1990 to 1992.
• Shri Trinath Mishra served as DG from 1996 to 2000.

Shri Surendranath is the earliest appointee among the choices given. Shri K.F. Rustamji (often confused with the distractor "A.F. Rustomjee") was the founding Director General of the Border Security Force (BSF), not the CISF.