The correct answer is: Only assumption I is implicit.
The statement “You have to bear your expenses on travel etc” implies that the candidates are not entitled to reimbursement of expenses. This is because the statement explicitly states that the candidates have to bear their own expenses. This does not mean that all the candidates may claim reimbursement of expenses, or that many organizations reimburse expenses on travel to candidates called for written examination. It is possible that some organizations do reimburse expenses, but this is not implied by the statement.
Assumption I is implicit because the statement implies that the candidates are not entitled to reimbursement of expenses. If the candidates were entitled to reimbursement, the statement would not have been necessary.
Assumption II is not implicit because the statement does not say anything about whether or not other organizations reimburse expenses. It is possible that other organizations do reimburse expenses, but this is not implied by the statement.