To answer this question, we need to know the highest score ever recorded in a single innings in T20 Internationals.
Let's go through each option to determine the correct answer:
Option A) 259 - This option is incorrect because the highest score in a T20 International innings is higher than 259.
Option B) 260 - This option is correct. The highest score in a T20 International innings is 260. This record was achieved by Sri Lanka against Kenya on September 14, 2007.
Option C) 262 - This option is incorrect because the highest score in a T20 International innings is not 262.
Option D) 284 - This option is incorrect because the highest score in a T20 International innings is not 284.
Therefore, the correct answer is Option B) 260.