Canada
Thailand.
Mexico.
No country is located at 150 degrees north latitude 100 degrees east longitude, as those coordinates would be in the Arctic Ocean near the North Pole.
A location at 20° N latitude and 100° W longitude would be in the eastern part of Mexico, possibly near the Yucatan Peninsula.
The country that is located at 65 degrees North latitude and 20 degrees West longitude is Iceland. The country that is located at 65 degrees North latitude and 20 degrees West longitude is Iceland.
There is no country located at that position, the point is in the Pacific Ocean off the West coat of Mexico.
Mexico City is located at 19° 25' N latitude and 99° 7' W longitude, which is close to the coordinates provided.
The country located at 40 degrees north latitude and 100 degrees east longitude is China.
The USA, is the country at 40 degrees North latitude, and 100 degrees West longitude. The state of Nebraska contains precise location.
The Gulf of Thailand is located to the east of the intersection of 100° E longitude and 10° N latitude.
An island located at 100 latitude and 74 longitude does not exist as 100 latitude is beyond the range of latitudes on Earth. The latitude range on Earth is approximately -90 to 90, so a latitude of 100 would not be valid.