<prompt> About Linear energy transfer all are false exceptLow LET radiations are more lethalIt is the propey of the tissueSame as relative biological effectivenessHigh LET radiations have low oxygen enhancement ratio  <response>: LET linear energy transfer - it is the amount of energy deposited per unit length. Given as Kev micrometer. It is highest for alpha paicle high LET, low for beta paicles and gamma emissions Low LET. It is a propey of the radiation. OER oxygen enhancement ratio is the ratio of the quantity of radiation required to kill tumor cells in the absence of oxygen to the quantity of radiation required to kill the same amount of tumor cells in the presence of oxygen. OER is low for high LET radiations OER 1 and high for low LET radiationsOER 2-3. 