The correct answer is option 3, Lake Gatun.

The Suez Canal is a man-made waterway in Egypt that connects the Mediterranean Sea with the Red Sea. It is about 120 miles long and has several lakes along its route.

Option 1, Great Bitter Lake, is located on the Suez Canal. It is the largest of the lakes and is situated in the middle of the canal.

Option 2, Little Bitter Lake, is also on the Suez Canal. It is smaller in size and located towards the northern end of the canal.

Option 4, Lake Timsah, is another lake along the Suez Canal. It is situated towards the southern end of the canal and is smaller in size compared to the Great Bitter Lake.

However, option 3, Lake Gatun, is not on the Suez Canal. It is actually located in Panama and is part of the Panama Canal. Therefore, if you travel along the Suez Canal from Port Said to Suez, you will not come across Lake Gatun.

Alert - correct answer should be "4, Lake Timsah".