So what you think guys, as we all know every section carry equal marks, so how can we even think that which is most important. Every section is most important, you have to prepare all section to get good scores but yes, the most important thing is to divide the time according to your efficiency.
Practice with unsolved banking paper of previous year banking exams and calculate your time according to your proficiency, like if you are good in computer then try to minimize time there and give saved time to the section that you are not so much efficient.
Remember one thing friend, "solving the question in banking exams or any other exam is not a challange but solving the question in given time is the real challange."
In banking PO/Clerk exam, the examinor just want to check that how you manage your time efficiently. So before you go to examination hall, calculate your time and devide the timing for every section.