Answer options in exam skips BJP for coalition partner in J&K

In an embarrassment for the Jammu and Kashmir government, a question in an examination paper of class X asked students to name the alliance partner that formed the coalition along with PDP in the state but did not mention BJP as one of the four options.
The multiple choice question of social studies subject for the 10th standard board examination read "In March 2015, PDP formed a coalition government in J&K with?", giving four options to choose from.
However, the BJP, which is PDP alliance partner in the Jammu and Kashmir, did not figure in the list of options given to the students.

The options given were Indian National Congress, National Conference, CPI(M) and PDF. The latter two parties have one MLA each in the state assembly.
Following the incident, Education Department officials said an inquiry will be conducted into the matter and "responsibility fixed".
The students, who were stumped not to find BJP among the options, have demanded that all answers should be treated as correct.