Which of the following destinations would experience the greatest difference in temperatures between summer and winter months? Is it nassau,bahamas or anchorage,Alaska or calcutta,india or philadelphia,Pennsylvania

Id have to say anchorage,Alaska. Summer can get into the mid 70's... sunny warm. Winter... can get down to -30 or more.
But avg temps:
Alaska: summer mid to high 60's... winter 8, 9 degrees (F)
India... avgs 80+ all year for highs.
Phili: mid 80's summer, 20's winter

The farther from the equator, the wider the range of temperatures, aside from things like geothermal energy, warm ocean currents, etc. correct?