A student is ranked 12th from right and 6th from left. How many students are there in totality ?  Choose the correct choice from the following choices:
A) 17  B) 19  C) 20  D) 21  E) 22
From right 12 , From left 6   Total = 12+6-1= 
<gadget id="calculator">12+6-1</gadget>
<output>17</output>
17   ANSWER:19
<result>B</result>
A student is ranked 12th from right and 6th from left. How many students are there in totality ?