Which of the following statements are correct about Sikkim Issue?(a) The first Democratic elections to the Sikkim assembly in 1974 were swept by Sikkim Congress.(b) Kazi Lhendup Dorji Khangsarpa was a founder of Sikkim Praja Mandal.(c) Kazi Lhendup Dorji Khangsarpa founded Sikkim National Congress in 1962.(d) Sikkim became the 23rd state of the Indian Union.

• A. Only (a), (b), (d)
• B. Only (a), (c), (d)
• C. Only (b), (c), (d)
• D. Only (a), (b), (c)