(i) The agreement emphasized on urgent need to address the significant gap between the aggregate effect of Parties' mitigation pledges in terms of global annual emissions of greenhouse gases by 2020 and aggregate emission pathways consistent with holding the increase in the global average temperature to well below 2°C above preindustrial levels and pursuing efforts to limit the temperature increase to 1.5°C above preindustrial levels. (ii) Paris Summit - not all nations have signed the agreement and there is no deadline to ratify it. hence, statement 1 is wrong. This eliminates a and b. And developed countries committed to give $100 billion by 2020. But, for future, there is no mention of giving $1,000 billion dollars. Therefore, third statement wrong. We are left with Answer (b) only.