Which one of the following is not one of the major penalties prescribed in the Central Industrial Security Force Rules, 2001 ?

Under Rule 34 of the Central Industrial Security Force (CISF) Rules, 2001, penalties are categorized into Major and Minor types. Major penalties include dismissal from service, removal from service, compulsory retirement, and reduction to a lower time scale of pay, grade, post, or service (as mentioned in options B, C, and D). Minor penalties, as per Rule 34 (vi), include the reduction to a lower stage in the time scale of pay by one stage for a period not exceeding three years, without cumulative effect and not adversely affecting pension. Option A describes this specific minor penalty (noting that while the rule mentions 'pension', the structural description of 'not exceeding three years' and 'without cumulative effect' defines it as minor). Therefore, Option A is the correct answer as it is not classified as a major penalty.