Is it possible to apply for MS in US just by comleting only first year of masters if is 3 years India that after 12 plus undergraduation 15 education?

No, you generally cannot apply for an MS program in the US after completing only the first year of a 3-year master's program in India. US universities require a completed bachelor's degree (or its equivalent) for admission to their MS programs. A first year of a master's degree is not considered a completed bachelor's degree. You would need to complete your 3-year master's degree in India *before* applying to US MS programs.