समुद्री जल से साधारण नमक मुख्य रूप से निम्नलिखित में से किस विधि द्वारा प्राप्त किया जाता है?

Who among the following founded the 'Forward Bloc'?

Which of the following statements regarding the Harappan Civilization is NOT correct?

Which ruler is generally credited with unifying much of Northern India under a single empire for the first time?