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).

[EX Q]: Abstract: We have assigned the rat GH gene to chromosome 10 and the rat PRL gene to chromosome 17. DNA from a series of mouse BWTG3 x rat hepatocyte somatic cell hybrids, each of which has retained a unique complement of rat chromosomes, was analyzed for the presence of rat GH and PRL genomic fragments by Southern blotting. Radiolabeled complementary DNAs (cDNAs) encoding rat GH and rat PRL were used as molecular probes. Based upon these assignments, we conclude that the evolutionarily related GH and PRL genes have been dispersed to different chromosomes in rat as in man.
Which is the apt title for the abstract? option1: The related genes encoding growth hormone and prolactin have been dispersed to chromosomes 10 and 17 in the rat. option2: A randomized study comparing a high and a standard dose of cisplatin in combination with etoposide in the treatment of advanced non-small-cell lung carcinoma.
[EX A]: The related genes encoding growth hormone and prolactin have been dispersed to chromosomes 10 and 17 in the rat.

[EX Q]: Abstract: Platelet-activating factor (PAF-acether), an inflammatory mediator with a wide range of biological activities including neutrophil aggregation and chemotaxis, was studied for its effect on human eosinophil locomotion (chemotaxis and chemokinesis). Human eosinophils (25-95% purity) were obtained from donors with a variety of diseases associated with hypereosinophilia. PAF-acether elicited directional locomotion of eosinophils, in a time- and dose-dependent fashion, at concentrations from 10(-5) to 10(-8) M; lyso-PAF had minimal activity over the same dose range. Compared with PAF-acether, the eosinophil locomotory responsiveness of leukotriene B4 (LTB4), histamine, and the valyl- and alanyl-eosinophil chemotactic factor of anaphylaxis (ECF-A) tetrapeptides was negligible. Conversely, neutrophil responsiveness to PAF-acether (optimum 10(-6) M) was comparable in effect to LTB4 (optimum dose 10(-8) M). It was shown that PAF-acether elicited both chemotaxis and chemokinesis of eosinophils. Comparison of normal density and light density eosinophils revealed no qualitative difference in the response to PAF-acether and the other chemoattractants, although the light density cells seemed to demonstrate a greater degree of locomotion to PAF-acether and LTB4. Thus, PAF-acether appears to be a potent eosinophilotactic agent which may play a role in inflammatory reactions characterized by eosinophil infiltration.
Which is the apt title for the abstract? option1: Platelet-activating factor. A potent chemotactic and chemokinetic factor for human eosinophils. option2: Oral leukoplakia [editorial]
[EX A]: Platelet-activating factor. A potent chemotactic and chemokinetic factor for human eosinophils.

[EX Q]: Abstract: The development of mouse and human embryos was assessed in human amniotic fluid to determine its suitability as a culture medium for human in vitro fertilization (IVF). Two-cell mouse embryos developed to blastocysts after 72 hours at rates similar to that in Whittingham's T6 + 10% fetal calf serum. Significantly more mouse embryos hatched in amniotic fluid. No difference was found between individual patient's amniotic fluids obtained at 16 to 21 weeks' gestation. A preliminary trial comparing amniotic fluid with T6 + maternal serum in human IVF showed no significant difference in fertilization rate and embryo development during 42 to 48 hours in vitro. Expanded blastocysts were obtained in amniotic fluid after 5 days in vitro. Four pregnancies were obtained in 9 patients' transferred embryos grown in amniotic fluid and with 2 or 12 patients' transferred embryos grown in T6 + maternal serum.
Which is the apt title for the abstract? option1: The successful use of human amniotic fluid for mouse embryo culture and human in vitro fertilization, embryo culture, and transfer. option2: National survey of writers of dean's letters for residency applications.
[EX A]:
The successful use of human amniotic fluid for mouse embryo culture and human in vitro fertilization, embryo culture, and transfer.