CREATE TABLE table_24463 ("Category" CLOB, "Sub-category" CLOB, "Cab size" CLOB, "Drive wheels" CLOB, "Capacity  ( litres ) " CLOB)

Name the number of cab size for 4 medium tanker
SELECT COUNT("Cab size") FROM table_24463 WHERE "Category" = '4 Medium tanker'
SELECT COUNT("Cab size") FROM "table_24463" WHERE "Category" = '4 Medium tanker'