Given an abstract, indicate which of the provided candidate titles (Option1 and Option2) best describes it (respond with the text of the title, not option1/2).

[Q]: Abstract: Ewes were treated systemically during the periovulatory period with the antihistamines diphenhydramine (H1-receptor antagonist) and(or) cimetidine (H2-receptor antagonist). None of the treatments prevented ovulation. However, the combination of drugs inhibited subsequent function of the corpus luteum (CL) as assessed by serum measurements of progesterone. Administration of antihistamines did not alter pituitary secretion of LH. Injection of small quantities of diphenhydramine and cimetidine into the antrum of the preovulatory follicle also caused aberrant luteal activity, but no blockade of ovulation. Intrafollicular injection of histamine reversed the inhibitory influence of antihistamines on the CL. Antihistamines suppressed preovulatory thecal edema and antral influx of plasma transudate containing LH. Thus, the effects of antihistamines appear to have been exerted at the follicular level. Function of matured CL was not compromised by peripheral administration of antihistamines. Actions of histamine within the preovulatory ovine follicle do not appear to be a prerequisite for ovulation, but apparently do have an impact on ensuing luteal function. We propose that a hyperemic reaction to histamine in preovulatory follicles enhances vascular filtration of LH. As a consequence, maximal permeation of the avascular granulosal layer of the follicle by LH leads to a normal luteinization response.
Which is the apt title for the abstract? option1: Ovarian function in ewes treated with antihistamines. option2: Therapy-related leukemia and myelodysplastic syndrome: clinical, cytogenetic, and prognostic features.
[A]: Ovarian function in ewes treated with antihistamines.

[Q]: Abstract: The study reported here provides information on National Board of Medical Examiners (NBME) examination policies from all U.S. medical schools (n = 67) that require students to pass the examination. Most of these schools have similar policies on use of a 380 total score as the passing level for the NBME Part I examination, allowing three attempts to pass the examination, interrupting a student's progress into the clinical curriculum upon failure of the examination, officially providing time for preparation for taking the test, and requiring students to pass the Part II examination.
Which is the apt title for the abstract? option1: Policies of U.S. medical schools on the use of the NBME Part I and Part II examinations. option2: The origin of prenatal and postnatal deformities.
[A]: Policies of U.S. medical schools on the use of the NBME Part I and Part II examinations.

[Q]: Abstract: An emergency environmental health investigation of a mass poisoning of unknown origin is a multidiscipline effort that requires the cooperation and close communication of epidemiologists, toxicologists, and chemists. The laboratory's role in this effort is important; special instruments, knowledge, and experience are needed. Our approach to such an investigation is discussed and past cases are used as illustrations. The role of the analytical chemist is presented, and the major resources needed for these investigations are described.
Which is the apt title for the abstract? option1: The laboratory's role in environmental health emergency investigations. option2: Selective screening device for the early detection of normal or delayed cognitive development in infants at risk for later mental retardation.
[A]:
The laboratory's role in environmental health emergency investigations.