4. Which of the following is not an example for online data processing ?
i. display the balance amount after making a call in a mobile phone
ii. withdraw cash from your bank account
iii. "reservation of a seat in an airline
iv. monthly billing statement of a credit card sent by a bank to a customer
updating of inventory while billing in a supermarket counter
V.

answer; ///i believe that the correct answer is (d); ///

answer: the blood-brain barrier is a layer of specialized membranes and cell processes designed to keep undesirable substances from passing from the bloodstream into the precious tissues of the brain. while the blood-brain barrier does keep most bad things out of the central nervous system, it is not impermeable.

explanation:

the answer is d (apex) good luck : ))

b.have there own function.